diff --git a/CHANGES.rst b/CHANGES.rst
index 171bb70..377b05a 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,11 @@
 - Updated ``AstropyRegions`` translator to export ``roi.theta`` angle
   (supported as of ``glue`` 1.5.0). [#73]
 
-- Added support to import and export specreduce Trace objects. [#72]
+- Added support to import and export ``specreduce`` ``Trace`` objects. [#72]
+
+- Translators for ``CCDData``, ``regions``, ``Spectrum1D``, ``SpectralCube``
+  and ``specreduce.tracing.Trace`` objects are now loaded upon availability,
+  making the corresponding packages optional requirements. [#76]
 
 0.4.0 (2022-04-07)
 ------------------
diff --git a/glue_astronomy/__init__.py b/glue_astronomy/__init__.py
index e64201e..e0fcb47 100644
--- a/glue_astronomy/__init__.py
+++ b/glue_astronomy/__init__.py
@@ -1,5 +1 @@
 from .version import version as __version__  # noqa
-
-
-def setup():
-    from glue_astronomy import translators  # noqa
diff --git a/glue_astronomy/conftest.py b/glue_astronomy/conftest.py
index 6e45695..c5cf617 100644
--- a/glue_astronomy/conftest.py
+++ b/glue_astronomy/conftest.py
@@ -1,3 +1,6 @@
 def pytest_configure(config):
-    from glue_astronomy import setup
-    setup()
+    from glue_astronomy.translators import setup_ccddata, setup_regions, setup_spectrum1d
+
+    setup_ccddata()
+    setup_regions()
+    setup_spectrum1d()
diff --git a/glue_astronomy/translators/__init__.py b/glue_astronomy/translators/__init__.py
index 497254e..47f8ece 100644
--- a/glue_astronomy/translators/__init__.py
+++ b/glue_astronomy/translators/__init__.py
@@ -1,5 +1,18 @@
-from . import ccddata  # noqa
-from . import regions  # noqa
-from . import spectral_cube  # noqa
-from . import spectrum1d  # noqa
-from . import trace # noqa
+def setup_ccddata():
+    from . import ccddata  # noqa
+
+
+def setup_regions():
+    from . import regions  # noqa
+
+
+def setup_spectral_cube():
+    from . import spectral_cube  # noqa
+
+
+def setup_spectrum1d():
+    from . import spectrum1d  # noqa
+
+
+def setup_trace():
+    from . import trace  # noqa
diff --git a/setup.cfg b/setup.cfg
index c54ffee..0108aed 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -19,12 +19,13 @@ setup_requires =
 install_requires =
     astropy>=4.0
     glue-core>=1.0
+
+[options.extras_require]
+all =
     regions>=0.4
     specutils>=0.7
     specreduce>=1.0.0
     spectral-cube>=0.6.0
-
-[options.extras_require]
 docs =
     sphinx
     sphinx-automodapi
@@ -36,13 +37,21 @@ test =
     pytest-astropy
     pytest-cov
     mock
+    regions>=0.4
+    specutils>=0.7
+    specreduce>=1.0.0
+    spectral-cube>=0.6.0
 qt =
     PyQt5
 
 [options.entry_points]
 glue.plugins =
-    glue_astronomy = glue_astronomy:setup
-    spectral_cube = glue_astronomy.io.spectral_cube:setup
+    ccddata = glue_astronomy.translators:setup_ccddata
+    regions = glue_astronomy.translators:setup_regions
+    spectrum1d = glue_astronomy.translators:setup_spectrum1d
+    spectral_cube = glue_astronomy.translators:setup_spectral_cube
+    spectral_cube_io = glue_astronomy.io.spectral_cube:setup
+    trace = glue_astronomy.translators:setup_trace
 
 [options.package_data]
 glue_astronomy.io.spectral_cube.tests = data/*, data/*/*,  data/*/*/*